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Mobile Multimedia and Multimedia Systems Perspectives

Mobile Multimedia and Multimedia Systems Perspectives. Introduction. Wireless is moving into broadband: - 3G, 4G mobile networks - WLAN - DVB-H - WIMAX How to make maximum use of these systems?. Technology progress.

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Mobile Multimedia and Multimedia Systems Perspectives

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  1. Mobile Multimediaand Multimedia Systems Perspectives

  2. Introduction • Wireless is moving into broadband: - 3G, 4G mobile networks - WLAN - DVB-H - WIMAX • How to make maximum use of these systems?

  3. Technology progress • Broadband wireless media technology is behind the corner: • 3G ONBOARD • 4G ONBOARD • WLAN ONBOARD • ALL INTEGRATED ONBOARD

  4. COMPLEX MEDIA SYSTEMS BEHIND WLAN

  5. Wireless networks WLAN OTHER 3G-4G Mobile IEEE 802.11a+b+g +n Other

  6. System reqirements • Operator wants efficient resource management: transmission coverage and cost • User wants minimized cost of access and seamless operation

  7. Seamless challenge • Seamless changeover (handover) between the systems is technical challenge • Heterogenous networks may not be synchronised, even content stream may not be identical (e.g. different compression ratios)

  8. Gateways and managers • The changeover problem can be solved by embedding gateways on the network side and/or managers on the terminal side Multisystem terminals for 3G+WLAN will have severe limitations on power consumption

  9. Handover requirements • Seamless means perfect stream splicing • This can be done when streams are aligned in buffers and synchronized • In general time stamps and bitrates may not be identical

  10. Gateways and managers DVB-H TERMINAL MANAGER NETWORK GATEWAY WLAN 3G In case of operator controlled networks gateway ensures synchronization. In heterogenous networks terminal performs synchronization and handover

  11. FUTURE MOBILE SYSTEM • IS BROADBAND FOR MULTIMEDIA • IT SUPPORTS MULTIPLE NETWORK TYPES (3G, WLAN, 4G….) • IT SUPPORTS MULTIPLE OPERATION MODES: UNICAST, MULITCAST, BROADCAST, MULTISTREAMING THE SYSTEM IS IP PROTOCOL BASED !

  12. MOBILE DATA BANDWIDTH • FUTURE MOBILE SYSTEM WILL HAVE DATA BANDWIDTH IN MEGABITS/SECOND 3G - 1-10 Mb/s 4G - 10-50 Mb/s WLAN - 1- 100 Mb/s

  13. THE FUTURE MOBILE SYSTEM • THE FUTURE MOBILE SYSTEM ARCHITECTURE IS DEVELOPED THE STANDARD IS CALLED IMS (Internet Multimedia Subsystem) It is developed as an extension of 3G mobile standard (release 5,6) by 3GPP (www.3gpp.org) and IETF (www.ietf.org)

  14. THE IMS • The IMS is based on SIP protocol This allows setup of most complex multimedia sessions

  15. The IMS basic idea • The basic idea of IMS is integration of telephone CS (Circuit Switched) network and IP network running in wireless systems 3G version In USA Radio access in 3G. 4G

  16. User capabilities in IMS • The IMS extends widely the capabilities of current systems as regards the usage of the system • User may have two types of addresses: phone and Internet • Users may have multiple identities: work and private in same equipment • Users may have multiple terminals with different capabilities

  17. Mobile IP – Short Overview Key aspect of wireless networks is mobility. Mobility is realized in cellular systems based CS but it can be also realized in IP systems. Here we provide short overview of IP mobility. This does not mean it is realized in the IMS. IMS can use standard mobility realized in cellular systems.

  18. Mobile IP Key Principles The Wireless Internet is an IP-centric & mobility-enabled network: • IP addresses are used for all routing within the core network • IP protocols and technologies are used in the control plane • The network is functionally equivalent to a traditional cellular network (especially with respect to mobility and roaming)

  19. IP Mobility focuses on Layer 3 of the core network: Mobility functions are independent of the access technology (2G, 3G, wire line, etc.) and the underlying network transport technology (ATM, Ethernet, etc.) Mobile IP Key Principles Mobility is based on the user, not the terminal: • Users will have a single subscription in a home network • Service Level Agreements (SLA’ s) must exist between all networks users will roam in

  20. Mobile Node (MN): laptop, mobile phone, communicator,..etc • Home Agent (HA): router of the home network • Foreign Agent(FA): router of the foreign network Mobile IP Components

  21. Mobile IP Components (MN) (FA) (HA)

  22. Agent Discovery • Registration • Routing How Mobile IP works

  23. 1- HA’s and FA’s: periodically advertise their presence on their subnets by broadcasting agent advertisements 2-MN Listen: Am I on my home sub net or I am visiting some other subnet? OR 1- MN sends an agent solicitation 2- Any agent on the subnet is forced to send an immediate advertisement Agent Discovery

  24. MN determines that it is connected to an (FA) acquires a care of address • Care of Address: and IP address given to the MN by the FA (exit point of the tunnel from HA to FA) Agent Discovery

  25. MN recieved the care of address: register it with the HA • HA creats a mobility binding table • HA advertises reachability to the home IP address of MN • Example: a device connected to the internet called corresponding node (CN) sends a packet to MN, how it will reach MN? CN HA FA MN • power down or go back to home sub net: MN will deregister • HA reclaims MN through tunnel Registration

  26. Internet Mobility Manager Security Gateway Security Gateway Mobility Manager Router Router AAA+ AAA+ IP Mobility:a lower level look Visited Network IPSec SA 1 Home Network FA HA IPSec SA 3 IPSec SA 2 IPSec SA 4 Correspondent Node User Security Associations IPSec SA 1 - between security gateways IPSec SA 2 - between AAA servers IPSec SA 3 - between user/terminal and mobility manager IPSec SA 4 - between user/terminal and correspondent node

  27. Internet DNS IP Mobility Hand Over Home Network Mobility Manager Security Gateway Router Security Gateway Mobility Manager 5 Router 2a 10 Router 9 AAA+ Router 6 7 AAA+ Visited Network 2 LSF Mobility Manager Security Gateway Router 4 3 11 1 9a 7a 9 Router 8 AAA+ Router Correspondent Node Serving Network

  28. Capabilities Of Mobile IP • User identity and Addressability • Signaling and packet routing • Authentication and Authorisation • Security associations • Mobile client functionality • IP industry compatibility

  29. Haroon@SubNet1 is at home.Please ensure his datacomes here. Internet Backbone FA HA FA HA Haroon@SubNet1 is in our CDMA network.Please ensure his datacomes here. Internet Backbone How Does It Look like? At home On the road

  30. Haroon@SubNet1 is at work.Please ensure his datacomes here. Internet Backbone Enterprise LAN Why certainly, we have an arrangement with your Network operator. I can register you with free run of the house wireless LAN. HA FA FA HA Haroon@SubNet1 is in our hotel.Please ensure his data comes here. Internet Backbone How Does It Look like? At the office In a hotel

  31. Roaming in IMS Usser can roam in the CS (circuit switched) and IMS in different Combinations (being in CS directed to IMS and opposite)

  32. IMS layered architecture

  33. Acronyms in the IMS scheme • CSCF Call Session Control Function • PDF Policy Decision Function • BGCF Breakout Gateway Control Function • MRFC Mutlimedia Resource Function Controller • MRFP Multimedia Resource Function Processor • MGCF Multimedia Gateway Control Function • MGW Multimedia Gateway Function • SGW Signalling Gateway • SEG Security Gateway • SGSN Serving GPRS Support Node • GGSN Gateway GPRS Support Node • IMMGW Internet Multimedia Gateway

  34. HSS – Home Subscriber Server HSS has functions for CS and PS networks: Home Location Register HLR with Authentication Center AUC

  35. Signalling conversion in SGW Protocols from IMS domain (SIP) have to be converted to the CS domain

  36. IMS Architecture Some reference points: Gm – connection of UE to IMS (for SIP) Mw – connection between CSCF’s Cx – subscriber and service data Dx – connection to SLF (Sub. Locator Func. RAN – Radio Access Network SLP – Subscription Locator Function UE – User Equipment

  37. Conclusion IMS is a complicated system satisfying all possible multimedia requirements IMS will coexist with CS system At some point in the future all-IP systems may by used exclusively

  38. MULTIMEDIA SYSTEMSPERSPECTIVES MULTIMEDA SYSTEMS IREK DEFEE

  39. MULTIMEDIA SYSTEMS INTEGRATE ALL THE COMPONENTS DESCRIBED IN THIS COURSE: - SERVERS - NETWORKS - CLIENTS - SOFTWARE - CONTENT MULTIMEDA SYSTEMS IREK DEFEE

  40. WHAT WILL BE THE FUTURE IN MULTIMEDIA SYSTEMS? WHAT IS HAPENNING RIGHT NOW IS THAT NEW TECHNOLOGIES AND MULTIMEDIA SYSTEMS ARE COMING ALL THE TIME, ESPECIALLY IN THE MOBILE AREA • TERMINALS • NETWORKS • SOFTWARE MULTIMEDA SYSTEMS IREK DEFEE

  41. Historical development • From mobile phone to smartphone MULTIMEDA SYSTEMS IREK DEFEE

  42. MOBILE PHONES EVOLVED INTO MOBILE MEDIA AND SERVICE DEVICES THEY CHALLENGE PHOTOGRAPHIC CAMERAS, VIDEO CAMCORDERS, PORTABLE MUSIC PLAYERS, GAME CONSOLES AND SERVICE ACCESS DEVICES MULTIMEDA SYSTEMS IREK DEFEE

  43. Heterogenous networking • From GSM radio network via Bluetooth to… • WIRELESS BROADBAND or… • From tens of kilobits to megabits per second • 3G onboard WLAN onboard 4G onboard • ALL onboard MULTIMEDA SYSTEMS IREK DEFEE

  44. SO WE MAY THINK THAT MOST DEVICES • WILL BE MEDIA DEVICES AND CONNECTED BY • WIRELESS. • HOW THIS MAY HAPPEN? IN THE FUTURE • WE WILL HAVE HUGE RANGE OF APPLICATIONS • AND SERVICES: MULTIMEDA SYSTEMS IREK DEFEE

  45. WE WILL HAVE VARIETY OF TERMINAL DEVICES.... MULTIMEDA SYSTEMS IREK DEFEE

  46. NETWORKING PLATFORMS WILL BE INTEGRATING – ONE DEVICE WILL BE ABLE TO CONNECT TO DIFFERENT NETWORKS MULTIMEDA SYSTEMS IREK DEFEE

  47. HOWEVER, ALL THESE NETWORKS WILL BE BASED ON THE IP PROTOCOL: MULTIMEDA SYSTEMS IREK DEFEE

  48. HERE WE MOVE TO IP PROTOCOL • HERE THE BANDWIDTH GROWS • HERE ARE DIFFERENT NETWORK TYPES MULTIMEDA SYSTEMS IREK DEFEE

  49. WLAN From Telephone to Internet Telephone network for speech Internet for data and… everything IP networking is the future MULTIMEDA SYSTEMS IREK DEFEE

  50. New data transfer ways From: person-to-person phone call To: Data center-to-mass public - TV - Multicast Internet • 3G MBMS WLAN IP Multicast • Multimedia • Broadcast & • Multicast Massive distribution of content is possible rather soon MULTIMEDA SYSTEMS IREK DEFEE

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